GMS87C4060 Datasheet, PDF (49/102 Pages) Hynix Semiconductor – 8-BIT SINGLE-CHIP MICROCONTROLLERS

PRELIMINARY
GMS81C4040/87C4060
Serial I/O mode Register
ADDRESS : 0DE_H
RESET VALUE : -000 0001_b
RW RW RW RW RW RW R
SIOM
IOSW SM1 SM0 SCK1 SCK0 SIOST SIOSF
Serial Status
Input select
Clock Select
0: Busy
0: Sin
1: Finish
1: Sout
Serial COMM. Start
Send / Receive
0: Ignore
1: COMM. start
Serial I/O data Register
ADDRESS : 0DF_H
RESET VALUE : Undefined
RW RW RW RW RW RW RW RW
SIOR
D7 D6 D5 D4 D3 D2 D1 D0
Figure 13-2 Serial I/O Registers
Serial I/O Interrupt
Service routine
No
SIOSF=1?
Yes
SE=0
Abnormal operation
// SE : Interrupt enable bit
Write SIOM
// SR : Interrupt request flag
No
SR=0?
Yes
Normal operation
Overrun error
Figure 13-3 Example for serial I/O check by S/W
Input clock
Sclk
SIOST
Sout
Sin
IFSIO
D0
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
Figure 13-4 Serial I/O Timing Chart
Nov. 1999 Ver 1.0
PRELIMINARY
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